“power”的概念、定义、翻译、参考文献-科学参考

power

Physics

1. (in physics) Symbol P. The rate at which work is done or energy is transferred. In SI units it is measured in watts (joules per second). See also horsepower.

2. (in mathematics) The number of times a quantity is multiplied; e.g. x⁵ is the fifth power of x. A power series is one in which the power of the variable increases with each term, e.g. a₀+a₁x+a₂x²+a₃x³+…+a_nxⁿ.

Mathematics

When a real number a is raised to the index p to give a^p, the result is a power of a, and p is often referred to as the power. The same index notation is used in other contexts, for example to give a power A^p of a square matrix (see power (of a matrix)) or a power g^p of an element g in a multiplicative group. For details of how general powers of positive numbers are rigorously defined, see index.

Statistics

See hypothesis test.

Science and Technology

The rate at which work is performed. Work is done when a force displaces an object, i.e. the force moves its point of application. Power is the rate at which this happens and is calculated as work divided by time (P = W/t). The international unit of power is the watt (W); 1 W = 1 Joule per second. The older unit, horsepower (hp), is still used in some contexts; 1hp = approximately 750 W.
Mike Allaby

Chemical Engineering

The work done or energy transferred per unit time. In SI units, it is measured in watts (that is, joules per second).

Geography

The power structure of a society is reflected in its social organization and in its economy: capitalism is controlled by a minority who dominate the factors of production. In a centrally planned economy it is the state that dominates, and these have their own spatial expression; see Boudreau (2007) Env. & Plan. A 39, 11 on making new political spaces.
Geographies of power study the spatial distribution of power across a multiplicity of geographical scales, from the body to the globe. The mix of scales changes dynamically, as territories are continually subjected to resistance, contestation, renegotiation, deterritorialization, and reterritorialization; see, for example, Mawdsley (2007) Geog. Compass 1, 3 on China and Africa as emerging challenges to the geographies of power.
Themes include state formation, where power is transmitted through social channels to territorial ones; see, for example, Jessop (2007) Pol. Geog. 26, 1 and the relationship of minority cultures and empowerment, as in Mavroudi (2008) Pol. Geog. 27, 1, on Palestine. See Kobrin (2001) in A. Rugman and T. Brewer (2003).

Economics

Strength in arranging the terms of one’s dealing with other firms or people. See also bargaining power; countervailing power; monopoly power.

单词	power
释义	power Physics 1. (in physics) Symbol P. The rate at which work is done or energy is transferred. In SI units it is measured in watts (joules per second). See also horsepower. 2. (in mathematics) The number of times a quantity is multiplied; e.g. x⁵ is the fifth power of x. A power series is one in which the power of the variable increases with each term, e.g. a₀+a₁x+a₂x²+a₃x³+…+a_nxⁿ. Mathematics When a real number a is raised to the index p to give a^p, the result is a power of a, and p is often referred to as the power. The same index notation is used in other contexts, for example to give a power A^p of a square matrix (see power (of a matrix)) or a power g^p of an element g in a multiplicative group. For details of how general powers of positive numbers are rigorously defined, see index. Statistics See hypothesis test. Science and Technology The rate at which work is performed. Work is done when a force displaces an object, i.e. the force moves its point of application. Power is the rate at which this happens and is calculated as work divided by time (P = W/t). The international unit of power is the watt (W); 1 W = 1 Joule per second. The older unit, horsepower (hp), is still used in some contexts; 1hp = approximately 750 W. Mike Allaby Chemical Engineering The work done or energy transferred per unit time. In SI units, it is measured in watts (that is, joules per second). Geography The power structure of a society is reflected in its social organization and in its economy: capitalism is controlled by a minority who dominate the factors of production. In a centrally planned economy it is the state that dominates, and these have their own spatial expression; see Boudreau (2007) Env. & Plan. A 39, 11 on making new political spaces. Geographies of power study the spatial distribution of power across a multiplicity of geographical scales, from the body to the globe. The mix of scales changes dynamically, as territories are continually subjected to resistance, contestation, renegotiation, deterritorialization, and reterritorialization; see, for example, Mawdsley (2007) Geog. Compass 1, 3 on China and Africa as emerging challenges to the geographies of power. Themes include state formation, where power is transmitted through social channels to territorial ones; see, for example, Jessop (2007) Pol. Geog. 26, 1 and the relationship of minority cultures and empowerment, as in Mavroudi (2008) Pol. Geog. 27, 1, on Palestine. See Kobrin (2001) in A. Rugman and T. Brewer (2003). Economics Strength in arranging the terms of one’s dealing with other firms or people. See also bargaining power; countervailing power; monopoly power.
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